What is the correct sequence for periodicity references?

• A. MIPS -> MRC -> LOEP
• B. LOEP -> MRC -> MIPS
• C. MRC -> LOEP -> MIPS
• D. MRC -> MIPS -> LOEP

Answer: (D)

The sequence starts with defining what must be done and how often, then moves to scheduling that requirement, and finally presents the actual periods when the maintenance is active. The Maintenance Requirement Card establishes the maintenance task and its interval, serving as the authoritative source for what needs to be done. The Maintenance Interval Planning System takes that defined requirement and translates it into a concrete plan, assigning due dates and frequencies across the calendar. The List of Effective Periods then consolidates that plan into the periods during which the maintenance is valid and executable, letting crews see when tasks are due within the operational timeline. Because each step depends on the previous one, you wouldn’t start with the periods (LOEP) or a plan without a defined requirement (MIPS without MRC). So the logical flow is MRC, then MIPS, then LOEP.